This mockup looks great! The thumbs is much more explanatory than the light, dark, darker, mixed, Yetti, Yaru, Amibiance labels
So +1 for a great and user friendly experience with this suggestion, but the issue I see with this, is how it technically would be implemented
We (as in Ubuntu) would need to carry a patch for this. The Canonical guys will know if that’s something they want to do (@robert.ancell or @willcooke ?), but what happens when I select another theme in Tweaks (Arc, Adapta, Adwaita…)? Does this section disappear/disable?
The best and very longterm goal, would IMHO be to add a standard specification to the
index.theme in the theme folder - in collaboration with upstream (Freedesktop?) - where we could define if the theme is a light, dark or mixed theme and in the same folder provide a thumbnail.
At the moment there is no way for the software to detect if theme is light or dark or if any variants exist. So a standard would be great. I know that there has been some talk about this related to the “night light” discussion somewhere upstream.
I am always a big advocate for working upstreaming, but since Gnome don’t really want to support other themes I think just carrying a patch would be easier
I love the thumbnails but they have to be tailored to the individual theme, so perhaps a more universal solution would be to use symbolic icons like this or this